In 1950, after over fifty years of military occupation and colonial rule, the Nationalist Party of Puerto Rico staged an unsuccessful armed insurrection against the United States. Violence swept through the island: assassins were sent to kill President Harry Truman, gunfights roared in eight towns, police stations and post offices were burned down. In order to suppress this uprising, the US Army deployed thousands of troops and bombarded two towns, marking the first time in history that the US government bombed its own citizens.

Nelson A. Denis tells this powerful story through the...